P05-05 Impact of pain and fear of falling in walking performance under single and dual-task conditions in women with fibromyalgia

Abstract Background Fibromyalgia is characterized by stiffness and widespread pain which cause a negative impact on health-related quality of life and activities of daily living. In this regard, these activities are usually presented as dual-task situations (execution of two tasks simultaneously). Some physical fitness tests have been used under dual-task condition in order to evaluate physical fitness under a more ecological approach. It is hypothesized that physical fitness test could provide more information than physical fitness test under single-task condition. Therefore, the aim of the present study was to explore the relationship between 10m walking test performance under both single and dual- task conditions and the fear of falling and the intensity of pain in women with fibromyalgia. Methods A total of 38 women (55.65 [9.28] years-old) participated in the study. Participants performed the 10-m walking test where they have to walk on a 10 meters straight-line as fast as they can. Moreover, the fear of falling and the intensity of pain were measured by a visual analogue scale (0-100). Results Furthermore, the performance of 10-m walking test correlated positively with the fear of falling in both under single (rho= 0.550; p-value: > 0.001) and dual-task conditions (rho= 0.483; p-value: 0.002). However, the performance of 10m walking test only positively correlated with pain under dual-task condition (rho= 0.341; p-value: 0.031). In single task condition did not significantly correlate (rho= 0.252; p-value: 0.116). Conclusions The performance of 10m walking test under single and dual-task conditions are correlated with the fear of falling. However, the pain intensity only significant correlated with 10m walking test performance under dual-task condition. This could indicate that pain intensity has more influence than the fear of falling on decreasing the performance of a daily living activity such as walking. However, further studies under dual-task paradigm are needed to confirm this hypothesis.


Background
Fibromyalgia is characterized by stiffness and widespread pain which cause a negative impact on health-related quality of life and activities of daily living. In this regard, these activities are usually presented as dual-task situations (execution of two tasks simultaneously). Some physical fitness tests have been used under dual-task condition in order to evaluate physical fitness under a more ecological approach. It is hypothesized that physical fitness test could provide more information than physical fitness test under single-task condition. Therefore, the aim of the present study was to explore the relationship between 10m walking test performance under both single and dual-task conditions and the fear of falling and the intensity of pain in women with fibromyalgia. Methods A total of 38 women (55.65 [9.28] years-old) participated in the study. Participants performed the 10-m walking test where they have to walk on a 10 meters straight-line as fast as they can. Moreover, the fear of falling and the intensity of pain were measured by a visual analogue scale (0-100).

Results
Furthermore, the performance of 10-m walking test correlated positively with the fear of falling in both under single (rho= 0.550; p-value: > 0.001) and dual-task conditions (rho= 0.483; p-value: 0.002). However, the performance of 10m walking test only positively correlated with pain under dual-task condition (rho= 0.341; p-value: 0.031). In single task condition did not significantly correlate (rho= 0.252; p-value: 0.116).

Conclusions
The performance of 10m walking test under single and dualtask conditions are correlated with the fear of falling. However, the pain intensity only significant correlated with 10m walking test performance under dual-task condition. This could indicate that pain intensity has more influence than the fear of falling on decreasing the performance of a daily living activity such as walking. However, further studies under dualtask paradigm are needed to confirm this hypothesis. Keywords: Test, fitness, dual task, pain, fibromyalgia

Background
Sick leave due to musculoskeletal pain is common in the workforce. Time use in physical behaviors at work such as sitting, standing, low-(LIPA) and moderate-to-vigorous physical activity (MVPA) may impact on sick leave due to pain. However, studies addressing this relationship using technical measures of physical behaviors are scarce. The aim was to investigate the association between time-use compositions of physical behavior at work and sick leave trajectories due to musculoskeletal pain over one year.

Methods
We analyzed data of 981 workers in a Danish cohort (DPHACTO 2012(DPHACTO -2014. We assessed physical behaviors at work at baseline using thigh-worn accelerometers, and classified behaviors at work as sitting, standing, LIPA, and MVPA. Over 1 year follow-up, workers reported sick leave days due to musculoskeletal pain using text messages at 4-week intervals (14 waves). We used Latent class growth analysis to distinguish sub-groups with different trajectories of sick leave. We analyzed associations between time-use in physical behaviors and sick leave trajectories using multinomial regression analysis with adjustment for age, gender, BMI, smoking, and accelerometry-measured physical activity during leisure. Compositional data analysis was used to account for the co-dependency of different behaviors.

Results
We identified four distinct trajectories of sick leave due to pain over one year as follows: no sick days (prevalence 76%), few days-increasing trajectory (19%), some days-decreasing trajectory (3%), and some days-increasing trajectory (2%). Spending more time in sitting relative to the other behaviors was negatively associated with few days-increasing trajectory of sick leave (p > 0.001), while time in LIPA was positively associated with some days-increasing trajectory of sick leave (p = 0.001). Reallocating 60 min/day from sitting to other behaviors at work predicted a 22% increased likelihood of few days-increasing trajectory of sick-leave. In contrast, reallocating 30 min/day from LIPA to other behaviors at work predicted a 57% decreased likelihood for some days-increasing trajectory.

Conclusion
We found that compositions with more sitting relative to the other behaviors had lower odds for the trajectory with